Date:	Thu, 16 Dec 93 14:30:26 -0500
From:	DJ Delorie <dj AT ctron DOT com>
To:	mjo AT mrao DOT cam DOT ac DOT uk
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	Re: Interrupt routines in 1.11

> Are there any restrictions on length and the position of subroutines
> called by an interrupt and hooked in with a call to the wonderful
> _go32_dpmi_chain_protected_mode_interrupt_vector() subroutine ?

> We've got some code that works wonderfully well with a small interrupt
> handler but breaks when the handler grows or moves away from the
> _go32_....() call.

It may be that they need to be locked down so as to prevent paging
during an interrupt handler.  Have you tried calling the handler from
main() once to pre-load the pages?  That would make it happen less
often, but I don't know of a good easy fix for this.

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